Tungsten filler is used to protect equipment, operators and patients from radiation during an X-ray.

Tungsten filler is used to protect equipment, operators and patients from radiation during an X-ray.

COLLABO R A T IO N INNOVATION E X C EL LE NCE CORE VALUES INTEG R IT Y HONESTY R E SP EC T PERSONAL VALUES Historic Transformation PolyOne was established in 2000 through the consolidation of two historic companies in the materials industry.

Personal Values INTEG R IT Y R E SP ECT H O N E S T Y Core Values COLLABO R A T IO N E X C EL LE NCE INNOVATION OUR CULTURE 1 Annual Report | 2022 Dear Avient Shareholders, 2022 was a challenging year but also one filled with significant accomplishments that we look back on with a great sense of pride. EXHIBIT AND FINANCIAL STATEMENT SCHEDULES (a)(1) Financial Statements: The following consolidated financial statements of Avient Corporation are included in Item 8: Consolidated Statements of Income for the years ended December 31, 2022, 2021 and 2020 Consolidated Statements of Comprehensive Income for the years ended December 31, 2022, 2021 and 2020 Consolidated Balance Sheets at December 31, 2022 and 2021 Consolidated Statements of Cash Flows for the years ended December 31, 2022, 2021 and 2020 Consolidated Statements of Shareholders’ Equity for the years ended December 31, 2022, 2021 and 2020 Notes to Consolidated Financial Statements All other schedules for which provision is made in Regulation S-X of the SEC are not required under the related instructions or are inapplicable and, therefore, have been omitted.

B-4 (x) “Perforff mance Share” means a bookkeeping entry that records the equivalent of one Common Share awarded pursuant to Section 8 of this Plan. i) Subject to adjustment as provided in Section 12 of this Plan and the share counting rules set forff th in Section 3(b) of this Plan, the number of Common Shares available under this Plan for (A) Option Rights or Appreciation Rights, (B) Restricted Stock, (C) Restricted Stock Units, (D) Performance Shares or Perforff mance Units, (E) awards to non-employee Directors contemplated by Section 9 of this Plan, (F) awards contemplated by Section 10 of this Plan, or (G) dividend equivalents paid with respect to awardsmade under this Plan, will not exceed in the aggregate (x) 2,500,000 Common Shares minus (y) as of the Effeff ctive Date, one Common Share for every one Common Share subject to an award granted under the Predecessor Plan between March 1, 2017 and the Effeff ctive Date.

Personal Values INTEG R IT Y R E SP ECT H O N E S T Y Core Values COLLABO R A T IO N E X C EL LE NCE INNOVATION OUR CULTURE 1 Annual Report | 2021 2 0 2 1 Dear Avient Shareholders, 2021 was our first full year as Avient Corporation. EXHIBIT AND FINANCIAL STATEMENT SCHEDULES (a)(1) Financial Statements: The following consolidated financial statements of Avient Corporation are included in Item 8: Consolidated Statements of Income for the years ended December 31, 2021, 2020 and 2019 Consolidated Statements of Comprehensive Income for the years ended December 31, 2021, 2020 and 2019 Consolidated Balance Sheets at December 31, 2021 and 2020 Consolidated Statements of Cash Flows for the years ended December 31, 2021, 2020 and 2019 Consolidated Statements of Shareholders’ Equity for the years ended December 31, 2021, 2020 and 2019 Notes to Consolidated Financial Statements All other schedules for which provision is made in Regulation S-X of the SEC are not required under the related instructions or are inapplicable and, therefore, have been omitted.

Who We Are Personal Values INTEG R IT Y R E SP ECT H O N E S T Y Core Values COLLABO R A T IO N E X C E LL ENCE INNOVATION HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Goals & Metrics | Indices Sustainability Report | 2019 7 https://responsiblecare.americanchemistry.com https://endplasticwaste.org/about/ http://www.avient.com What We Do: Material Science Avient’s vision is to create specialized and sustainable material solutions that transform customer challenges into opportunities, bringing new products to life for a better world.

Who We Are Personal Values INTEG R IT Y R E SP ECT H O N E S T Y Core Values COLLABO R A T IO N E X C E LL ENCE INNOVATION HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Goals & Metrics | Indices Sustainability Report | 2019 7 https://responsiblecare.americanchemistry.com https://endplasticwaste.org/about/ http://www.avient.com What We Do: Material Science Avient’s vision is to create specialized and sustainable material solutions that transform customer challenges into opportunities, bringing new products to life for a better world.

Director since: 2011 Age: 68 Current Public Company Directorships: • None Current Non-Public Company Directorships: • X-Energy Reactor Company, LLC • Engine No. 1 Former Directorships: • Enbridge Inc. • Marathon Petroleum Corporation • MPLX LP • Andeavor Logistics, LP • Andeavor • DCP Midstream GP, LLC • QEP Midstream Partners, LP • Western Logistics GP LLC • Exxon Mobil Corporation ELECTION OF BOARD OF DIRECTORS PROXY STATEMENT 2025 | Annual Meeting of Shareholders 13 Neil Green Executive Vice President and Chief Digital Officer at Otis Worldwide Corporation (“Otis”), a leading elevator and escalator manufacturing, installation and service company, since 2020.

Colorant Chromatics™ X-Ray Opaque Formulations